Construct: Genomic fragment containing the y gene, with 92bp of 5' flanking sequences.
Body colour: body, head, wing & thoracic bristles, aristae, abdominal hairs, wild-type on y-; thoracic cuticle, wings, sex combs, reduced pigmentation; abdominal cuticle & tarsal claws, no pigmentation. Larval mouth part colour: no pigmentation on y-. Larval denticle belt colour: no pigmentation on y-.